1514205

Appears in sequences

• Triangle of numbers related to triangle A049213; generalization of Stirling numbers of second kind A008277, Bessel triangle A001497.at n=21A000369
• Quadruple factorial numbers n!!!!: a(n) = n*a(n-4).at n=23A007662
• Quadruple factorial numbers: Product_{k=0..n-1} (4*k + 3).at n=6A008545
• Partition number array, called M32(-3), related to A000369(n,m) = |S2(-3;n,m)| (generalized Stirling triangle).at n=29A143173
• Partition number array, called M32hat(-3)= 'M32(-3)/M3'= 'A143173/A036040', related to A000369(n,m)= |S2(-3;n,m)| (generalized Stirling triangle).at n=29A144279
• Partition number array, called M32hat(-3)= 'M32(-3)/M3'= 'A143173/A036040', related to A000369(n,m)= |S2(-3;n,m)| (generalized Stirling triangle).at n=45A144279
• Lower triangular array called S2hat(-3) related to partition number array A144279.at n=21A144280
• A partition product of Stirling_2 type [parameter k = 3] with biggest-part statistic (triangle read by rows).at n=27A157403
• Triangle read by rows, s_4(n, k) where s_m(n, k) are the Stirling-Frobenius cycle numbers of order m; n >= 0, k >= 0.at n=21A225471
• Triangle read by rows, 4^k*s_4(n, k) where s_m(n, k) are the Stirling-Frobenius cycle numbers of order m; n >= 0, k >= 0.at n=21A225478
• a(n) = (2*n - 1) * a(n-2) for n>1, a(0) = a(1) = 1.at n=12A235136
• Number of ways to place 3 points on a triangular grid of side n so that they are not vertices of an equilateral triangle of any orientation.at n=19A240440
• Triangle T(n,m) (n >= 1, 0 <= m < n) giving coefficients of (n-1)! P_n, where P_n is the polynomial formula for row n of A213086.at n=60A273528
• Table T(n,k) read by upward antidiagonals. T(n,k) = Product_{i=1..n} Sum_{j=1..k} (i-1)*k+j.at n=22A333445
• Array read by ascending antidiagonals, A(n, k) = -(-n)^k*FallingFactorial(1/n, k) for n, k >= 1.at n=51A349971
• A(n, k) = 4^n*Pochhammer(k/4, n). Square array read by ascending antidiagonals.at n=48A370915
• Number of pairs of triangles that are pairwise edge-disjoint in the complete graph K_n.at n=18A381862